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        <h2 id="待解决-1-APP-访问-dev-tee0权限问题"><a href="#待解决-1-APP-访问-dev-tee0权限问题" class="headerlink" title="(待解决)1.  APP 访问 /dev/tee0权限问题"></a>(待解决)1.  APP 访问 /dev/tee0权限问题</h2><p>详细描述： android app 权限低于10000, /dev/tee0权限：</p>
<p><code>crw------- root     root     248,   0 1912-12-20 04:34 tee0</code></p>
<p>暂时解决办法： chmod 666 /dev/tee0</p>
<p>弊端：所有app都能读写/dev/tee0</p>
<p>思路：app添加<code>android:sharedUserId=&quot;android.uid.system&quot;</code> 使app为系统app，签名时android studio平台签名出现问题，可在源码中编译</p>
<a id="more"></a>

<h2 id="2-TA参数只能传4个"><a href="#2-TA参数只能传4个" class="headerlink" title="2. TA参数只能传4个"></a>2. TA参数只能传4个</h2><p>operation params 结构体默认为4个</p>
<p>解决办法：1. 修改optee源码，但不具有通用性</p>
<ol start="2">
<li>将几个参数包装成结构体，注意结构体内不能有指针成员；或同类型合并同时传入长度</li>
</ol>
<h2 id="3-运行时出现trans-fault"><a href="#3-运行时出现trans-fault" class="headerlink" title="3. 运行时出现trans fault"></a>3. 运行时出现trans fault</h2><p>知识相关：optee运行时地址布局，页表映射机制</p>
<p>解决办法： TA_STACK_SIZE 指定了栈大小，而运行时超过该大小，将其值改大。</p>
<p>待解决：char *serial =”/proc/cpuinfo”; TEE_MemMov(cpu, serial, 13)出现错误。</p>
<h2 id="4-全局变量"><a href="#4-全局变量" class="headerlink" title="4. 全局变量"></a>4. 全局变量</h2><p>详细描述： 每次进入SW重新加载TA，之前运行时获得的全局变量已被销毁。</p>
<p>解决方法：全局变量写入文件保存，用时读取，但效率太低。</p>
<p>寻找更好方法中……………… </p>
<p><strong>user_ta_header_defines.h</strong> 中：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">define</span> TA_FLAGS                    (TA_FLAG_SINGLE_INSTANCE | TA_FLAG_MULTI_SESSION | TA_FLAG_EXEC_DDR | TA_FLAG_INSTANCE_KEEP_ALIVE)</span></span><br></pre></td></tr></table></figure>

<h2 id="5-参数传递"><a href="#5-参数传递" class="headerlink" title="5. 参数传递"></a>5. 参数传递</h2><p>字符串传递时末尾<code>‘\0’</code>  不会传递，不能使用<code>strlen()</code> 计算长度，将长度同时传递。</p>
<p><code>strlen</code> 长度不包括末尾<code>\0</code> </p>
<hr>
<h2 id="QSEE-TA"><a href="#QSEE-TA" class="headerlink" title="QSEE TA"></a>QSEE TA</h2><h3 id="1-添加新TA-helloCA"><a href="#1-添加新TA-helloCA" class="headerlink" title="1. 添加新TA [helloCA]"></a>1. 添加新TA [helloCA]</h3><p>路径core/bsp/trustzone/qsapps/ 下新建目录结构：</p>
<p><img src="file.png" alt="file"></p>
<p>SConscript内容相应如下：</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> os</span><br><span class="line">Import(<span class="string">'env'</span>)</span><br><span class="line"></span><br><span class="line">env = env.Clone()</span><br><span class="line"><span class="comment">#env.Append(CFLAGS = " -Werror ")</span></span><br><span class="line"></span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># Check if we need to load this script or just bail-out</span></span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># alias - First alias is always the target then the other possible aliases</span></span><br><span class="line">aliases = [</span><br><span class="line">   <span class="string">'helloCA'</span>, <span class="string">'all'</span></span><br><span class="line">]</span><br><span class="line"></span><br><span class="line">env.InitImageVars(</span><br><span class="line">  alias_list = aliases,       <span class="comment"># list of aliases, unique name index [0]</span></span><br><span class="line">  proc = <span class="string">'scorpion'</span>,               <span class="comment"># proc settings</span></span><br><span class="line">  config = <span class="string">'apps'</span>,            <span class="comment"># config settings</span></span><br><span class="line">  build_tags = [<span class="string">'APPS_PROC'</span>,</span><br><span class="line">                <span class="string">'HELLOCA_IMAGE'</span></span><br><span class="line">               ],</span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> <span class="keyword">not</span> env.CheckAlias():</span><br><span class="line">   Return()</span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># Configure and load in USES and path variables</span></span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line">env.LoadToolScript(<span class="string">'$&#123;BUILD_ROOT&#125;/core/bsp/build/scripts/secure_app_builder.py'</span>)</span><br><span class="line">env.InitBuildConfig()</span><br><span class="line">env.Append(OUT_DIR= os.getcwd())</span><br><span class="line">sconspath = env.subst(<span class="string">'$&#123;BUILD_ROOT&#125;/core/securemsm/trustzone/qsapps/helloCA/src/SConscript'</span>)</span><br><span class="line">env.Replace(SRC_SCONS_ROOT = sconspath.split(<span class="string">'SConscript'</span>)[<span class="number">0</span>])</span><br><span class="line">SConscript( sconspath, exports=<span class="string">'env'</span>,)</span><br><span class="line">env.Deploy(<span class="string">'SConscript'</span>)</span><br></pre></td></tr></table></figure>

<p>   路径core/securemsm/trustzone/qsapps/为项目源码文件夹，新建文件结构：</p>
<p><img src="file1.png" alt="file1"></p>
<p>SConscript内容如下：</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br></pre></td><td class="code"><pre><span class="line">Import(<span class="string">'env'</span>)</span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> env.has_key(<span class="string">'USES_NO_CP'</span>):</span><br><span class="line">  env.Append(CCFLAGS = <span class="string">' -DUSES_NO_CP '</span>)</span><br><span class="line">  </span><br><span class="line"><span class="comment">#-------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># Compiler, object, and linker definitions</span></span><br><span class="line"><span class="comment">#-------------------------------------------------------------------------------</span></span><br><span class="line">includes = [</span><br><span class="line">  <span class="string">"$&#123;BUILD_ROOT&#125;/core/api/kernel/libstd/stringl"</span>,</span><br><span class="line">  <span class="string">"$&#123;BUILD_ROOT&#125;/core/securemsm/trustzone/qsapps/helloCA/inc"</span>,</span><br><span class="line">  <span class="string">'$&#123;BUILD_ROOT&#125;/core/securemsm/sse/log/inc'</span>,</span><br><span class="line">  <span class="string">'$&#123;BUILD_ROOT&#125;/coreapi/securemsm/trustzone/qsee'</span></span><br><span class="line">]</span><br><span class="line"></span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># We need to specify "neon" to generate SIMD instructions in 32-bit mode</span></span><br><span class="line"><span class="comment">#------------------------------------------------------------------------------</span></span><br><span class="line"><span class="keyword">if</span> env[<span class="string">'PROC'</span>] == <span class="string">'scorpion'</span>:</span><br><span class="line">  env.Append(CCFLAGS = <span class="string">" -mfpu=neon "</span>)</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">target_name = <span class="string">'helloCA'</span></span><br><span class="line">app_name = <span class="string">'helloCA'</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment"># enable logging</span></span><br><span class="line">env.Append(CPPDEFINES = [<span class="string">'-DSSE_LOG_GLOBAL'</span>])</span><br><span class="line">env.Append(CPPDEFINES = [<span class="string">'-DSSE_LOG_FILE'</span>])</span><br><span class="line">env.Append(CPPDEFINES = [<span class="string">'-DLOG_TAG=helloCA'</span>])</span><br><span class="line"></span><br><span class="line"><span class="comment">#----------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># App core Objects</span></span><br><span class="line"><span class="comment">#----------------------------------------------------------------------------</span></span><br><span class="line">sources = [</span><br><span class="line">  <span class="string">'app_main.c'</span>,</span><br><span class="line">]</span><br><span class="line"><span class="comment">#-------------------------------------------------------------------------------</span></span><br><span class="line"><span class="comment"># Add metadata to image</span></span><br><span class="line"><span class="comment">#-------------------------------------------------------------------------------</span></span><br><span class="line">md = &#123;</span><br><span class="line">  <span class="string">'appName'</span>:    app_name,</span><br><span class="line">  <span class="string">'privileges'</span>: [<span class="string">'default'</span>],</span><br><span class="line">  <span class="string">'acceptBufSize'</span>: <span class="number">8192</span>,</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> env[<span class="string">'PROC'</span>] == <span class="string">'scorpion'</span>:</span><br><span class="line">  md[<span class="string">'memoryType'</span>] = <span class="string">'Unprotected'</span></span><br><span class="line"></span><br><span class="line">deploy_header_files = env.Glob(<span class="string">'../inc/*'</span>)</span><br><span class="line"></span><br><span class="line">helloCA_units = env.SecureAppBuilder(</span><br><span class="line">  sources = sources,</span><br><span class="line">  includes = includes,</span><br><span class="line">  metadata = md,</span><br><span class="line">  image = target_name,</span><br><span class="line">  deploy_sources = sources + [<span class="string">'SConscript'</span>] + deploy_header_files</span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="keyword">for</span> image <span class="keyword">in</span> env[<span class="string">'IMAGE_ALIASES'</span>]:</span><br><span class="line">  op = env.Alias(image, helloCA_units)</span><br></pre></td></tr></table></figure>

<p>  配置文件build/ms路径下build_config.xml中 &lt;target name=”common”&gt; 标签下添加</p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">file</span> <span class="attr">name</span>=<span class="string">"helloCA"</span></span></span><br><span class="line"><span class="tag">      <span class="attr">recompile</span>=<span class="string">"true"</span> &gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">artifact</span> <span class="attr">name</span>=<span class="string">"helloCA"</span> /&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">mapreport</span> <span class="attr">path</span>=<span class="string">"core/bsp/trustzone/qsapps"</span> /&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">param</span> <span class="attr">name</span>=<span class="string">"USES_FLAGS"</span> <span class="attr">value</span>=<span class="string">"USES_NO_CP"</span> /&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">file</span>&gt;</span></span><br></pre></td></tr></table></figure>

<p>相同路径下新建编译脚本helloCA.sh:</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line">python build_all.py -b TZ.BF.4.0 CHIPSET=sdm660 helloCA -c</span><br><span class="line"></span><br><span class="line">python build_all.py -b TZ.BF.4.0 CHIPSET=sdm660 helloCA</span><br><span class="line"></span><br><span class="line"><span class="comment">#:&lt;&lt;!</span></span><br><span class="line">adb shell mount /firmware -o rw,remount</span><br><span class="line"><span class="comment"># echo "start push smplap32...... goodixfp"</span></span><br><span class="line"><span class="comment"># find /home/yin/TZ.BF.4.0.7/trustzone_images/build/ms/bin/PIL_IMAGES/SPLITBINS_KAJAANAA/ -maxdepth 1 -name "smplap32.*" -exec adb -s f7a66acc push &#123;&#125; /firmware/image/ \;</span></span><br><span class="line"><span class="comment"># echo "push finished !" </span></span><br><span class="line"><span class="comment">#cat /sys/kernel/debug/tzdbg/qsee_log</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">echo</span> <span class="string">"start push helloCA......"</span></span><br><span class="line"><span class="keyword">for</span> f <span class="keyword">in</span> /home/yin/Documents/TZ.BF.4.0.7/trustzone_images/build/ms/bin/PIL_IMAGES/SPLITBINS_KAJAANAA/helloCA.*</span><br><span class="line"><span class="keyword">do</span></span><br><span class="line">	<span class="built_in">echo</span> <span class="variable">$f</span></span><br><span class="line">	adb -s f7a66acc push <span class="variable">$f</span> /firmware/image/</span><br><span class="line"><span class="keyword">done</span></span><br><span class="line"><span class="built_in">echo</span> <span class="string">"push finished !"</span></span><br><span class="line"><span class="comment">#!</span></span><br></pre></td></tr></table></figure>


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